Answer: D, The show's crew had trouble wiring the equipment
Step-by-step explanation:
Summarizing the passage, Dean made a piece of audio equipment for "Fiorello," which, although it was a flop, was praised for its "special effects" that were "outstanding."
For Option A, although it shows that Dean made audio equipment, making it for "Fiorello" isn't sufficient to determine the quality of his equipment.
For Option B, the reason why the crew had trouble wiring the equipment is ambiguous, so the detail is too vague to determine whether or not there's a mention of quality.
For Option C, fixing on-site equipment results from the crew's problems wiring the equipment. Although it can be a sign of bad quality because of its complexity, the passage did not provide details regarding the equipment's reception/condition when it arrived in the theater.
Option D is the best answer. The review stating how the special effects were outstanding is likely from the equipment Dean manufactured. Since the theater company wasn't involved with the design of special effects (since, in the beginning, Dean was describing how he made the equipment,) it can be inferred that the equipment he made was good.